* Add analzyer for pubternal
This is based on some existing code from EF. I'm having a discussion
with them right now on the best way to share this logic.
I also added support for parameters here which was missing. We might
want to make this code converge with `BannedApiAnalyzer` which is much
more thorough than this.
This is using our existing package for testing analyzers thats the
*official* way to do it in our repo. Filed #12868 to track that.
* Add S C A R Y warnings to render tree types
* PR feedback
Ryan Nowak